The US Digital Signature Standard

The Digital Signature Standard (DSS) is a
cryptographic standard promulgated by the National Institute of
Standards and Technology (NIST) in 1994. It has been adopted as the
federal standard for authenticating electronic documents, much as a
written signature verifies the authenticity of a paper document. The
DSS was the first cryptographic standard developed under the regime
established by the Computer Security Act, which was intended to limit
the role of the National Security Agency (NSA) in the development of
civilian standards. Documents obtained by EPIC under the Freedom of
Information Act have demonstrated that the DSS development process
was, in fact, dominated by NSA.